\(^{n}C_r\) की factorial derivation में ((n-r)!) क्यों आता है?
Why does ((n-r)!) appear in the factorial derivation of \(^{n}C_r\)?
Explanation opens after your attempt
A. न चुनी गई वस्तुओं के internal orders हटाने के लिएTo remove internal orders of unchosen objects
Concept
In the (n!) count the orders inside the unchosen group are also counted extra. In exams understand both corrections (r!) and ((n-r)!).
Why this answer is correct
The correct answer is A. न चुनी गई वस्तुओं के internal orders हटाने के लिए / To remove internal orders of unchosen objects. In the (n!) count the orders inside the unchosen group are also counted extra. In exams understand both corrections (r!) and ((n-r)!).
Exam Tip
(n!) वाली गिनती में न चुने गए समूह के क्रम भी extra गिने जाते हैं। परीक्षा में (r!) और ((n-r)!) दोनों corrections समझें।
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